Is it legal to use real corporations in your game?

None of the corporations I might use would be the focus point, and I would use dozens. I haven’t started on the game, and am not dependent upon including their actual name. There seems to be a lot of grey area on issues like this since artistic expression is protected in the United States. Honestly, i’m more curious than anything else.

Yes, it’s a grey area. And not really something for Unity Answers.